Process for the extraction of elemental sulfur from leach residues of the sulphide ore treatment by distillation and condensation

摘要

A sulfurous compound such as a sulfur-rich "float" (concentrate) obtained by flotation of the residue from the leaching of a zinc concentrate is heated at a temperature not lower than the melting point of sulfur but below its boiling point, preferably not higher than 200 DEG C, more preferably not higher than 140 DEG C, and the evolving gas containing sulfur vapor is cooled at a temperature less than the melting point of sulfur, preferably at ordinary temperature, to condense sulfur. IMAGE